not well grounded, ill-founded
малаабгрунтаваны
mal fondé, dénué de fondement
прил.
poco probante / fondato
малообоснованные доводы — argomentazioni gratuite
Краткая форма: малообоснован
"Life is far too important a thing ever to talk seriously about." Oscar Wilde
"Free speech carries with it some freedom to listen." Warren E. Burger
"Honor is not the exclusive property of any political party." Herbert Hoover
"Hitch your wagon to a star." Ralph Waldo Emerson